Add 81/28 and 45/70
1st number: 2 25/28, 2nd number: 45/70
81/28 + 45/70 is 99/28.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 70 is 140
Next, find the equivalent fraction of both fractional numbers with denominator 140 - For the 1st fraction, since 28 × 5 = 140,
81/28 = 81 × 5/28 × 5 = 405/140 - Likewise, for the 2nd fraction, since 70 × 2 = 140,
45/70 = 45 × 2/70 × 2 = 90/140 - Add the two like fractions:
405/140 + 90/140 = 405 + 90/140 = 495/140 - 495/140 simplified gives 99/28
- So, 81/28 + 45/70 = 99/28
In mixed form: 315/28
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 81/28+90/70 81/56+45/70 81/84+45/70